Unit 4 - Integumentary System

Question 1

Skin -

Answer 1

Barrier for microorganisms
Receives stimuli
Vitamin D prod.
Thermoregulation

Question 2

Hair -

Answer 2

UV Protection
Keeps our harmful particles
Acts as sensory receptors to certain stimuli

Question 3

Nails -

Answer 3

Protection of skin on fingers/toes to prevent trauma

Question 4

Sweat/Sebaceous Glands -

Answer 4

Keeps body moisturized/lubricated

Sweats to allow for thermoregulation

Question 5

Epidermis -

Answer 5

Top layer
Barrier for microorganisms
Receives stimuli
Vitamin D prod. 
Thermoregulation

Question 6

Dermis -

Answer 6

Middle layer,

Utilizes blood vessels for thermoregulation

Question 7

Hypodermis -

Answer 7

Deepest layer
Uses adipose for insulation
Good for injections due to vascular nature

Question 8

Describe how the integumentary system responds to changes in temperature.

Answer 8

When we are too warm, blood vessels supplying the skin, dilate and more blood flows to the upper dermis to release heat to cool the body. When we are cold, the blood vessels constrict to decrease blood flow, and consequently heat loss, from our skin, turning it blue.